testlinear(6) Svgalib User Manual testlinear(6)NAME
testlinear, lineart - test a linear frame buffer
SYNOPSIStestlinearDESCRIPTION
Program to test linear addressing on Cirrus cards and on Mach32 (and
other cards which may support it).
Selects 640x480x256 and tries to enable a linear frame buffer (its vir‐
tual address is printed). Fills the screen in some color, then draws
pixels in random positions.
For Cirrus cards some direct hardware access is then made for highspeed
screen access. Except for the last (Cirrus only) test no speeds are
printed, but you are welcome to use 'time' to measure it. The program
draws 714400 one byte pixels plus a forced 1s delay and various rand()
calls for the pixels.
The testlinear demo needs a few presses of <Return> after each minimal
demo step. Even when it does not prompt for it. When it appears to be
stuck, just press <Return>.
The lineart demo is the same, but it accepts a command line with an
arbitrary number of modes. The modes may be either mode numbers or
names, or both. For example,
lineart 11 17 G800x600x32k 22
will give a display of mode 11. If a key is pressed mode 17 will
appear, followed by mode 20 and 22 as succesive keys are pressed.
This demo is part of svgalib and can be found in the demos/ subdirec‐
tory of the original svgalib distribution. However, it is not installed
in the system by default, s.t. it is unclear where you can find it if
your svgalib was installed by some linux distribution. Even then, when
you have the demo on your system, you probably won't have the sources
s.t. it is only of limited use for you.
In case of any such problem, simply get an svgalib distribution from
the net. You even don't need to install it. Just make in the demos/
subdirecty. As of this writing, svgalib-1.2.12.tar.gz is the latest
version and can be retrieved by ftp from sunsite.unc.edu at
/pub/Linux/libs/graphics and tsx-11.mit.edu at /pub/linux/sources/libs
which will most probably be mirrored by a site close to you.
SEE ALSOsvgalib(7), vgagl(7), libvga.config(5), threed(6), accel(6),
bg_test(6), eventtest(6), forktest(6), fun(6), keytest(6),
mousetest(6), scrolltest(6), speedtest(6), spin(6), testaccel(6),
testgl(6), vgatest(6), plane(6), wrapdemo(6)AUTHOR
This manual page was edited by Michael Weller <eowmob@exp-math.uni-
essen.de>. The exact source of the referenced demo as well as of the
original documentation is unknown.
It is very likely that both are at least to some extent are due to Harm
Hanemaayer <H.Hanemaayer@inter.nl.net>.
Occasionally this might be wrong. I hereby asked to be excused by the
original author and will happily accept any additions or corrections to
this first version of the svgalib manual.
Svgalib (>= 1.2.11) 29 July 1997 testlinear(6)
